JPH0787621A - Walking supporting motor vehicle - Google Patents

Abstract

PURPOSE:To provide a walking supporting vehicle comprising a steering rod planted on the machine body and a seat placed thereon in which an electromagnetic brake functions to sustain the machine body in stopped state even if an accelerator lever is turned or a manual switch is depressed so long as the seat is occupied by a person. CONSTITUTION:A priority decision means 7 compares an operating signal of an accelerator lever 3 for controlling the running, an ON signal from a seat sensor 4 for detecting occupancy of a seat by a person, and an ON signal from a manual switch 6 for releasing the electromagnetic brake 5 to make possible manual, running. If an ON signal is outputted from the seat sensor 4, the running vehicle is stopped and the brake 5 is actuated and when the vehicle is stopped, the brake operation is sustained as it is.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric walking auxiliary vehicle which is equipped with a battery and travels by a driving force of a motor.

[0002]

2. Description of the Related Art An electric walking assist vehicle has already been filed by the present applicant in Japanese Patent Application No. 4-64388. In this electric walker, a pedestrian holds a handlebar that is erected from a traveling body equipped with traveling wheels, and holds the handlebar with both hands to operate the accelerator lever to drive the vehicle so that the pedestrian can walk while holding the handlebar. The drive wheels of this electric pedestrian are controlled to rotate by a motor so as to rotate according to the walking speed of a pedestrian. In addition, a seat is provided on the traveling body so that the pedestrian can sit and rest when tired.

[0003]

The electric pedestrian is designed so that the electromagnetic brake prevents the vehicle from moving when it is stopped. For this reason, when the pedestrian sits on the seat with the traveling aircraft stopped, the braking action of the electromagnetic brake stabilizes the traveling aircraft without moving, but it is sitting on the seat with the traveling power switch on. If another person accidentally touches the accelerator lever, the drive wheel may rotate and the pedestrian sitting on the seat may fall. The present invention has the following configuration in order to eliminate such a risk.

[0004]

In the present invention, the traveling body 1
In an electric walking assist vehicle provided with a seat 2 on which a pedestrian can sit and rest, an operation signal of an accelerator lever 3 for controlling running, an ON signal of a seating sensor 4 for detecting a seated person on the seat 2, and an electromagnetic brake The ON signal of the hand push switch 6 which releases the braking action of 5 to enable the hand-traveling is compared and judged, and when the ON signal output of the seating sensor 4 is present, other signal outputs are ignored and the vehicle travels while traveling. Priority determination processing means 7 for braking the electromagnetic brake 5 after stopping the operation and continuing the braking operation of the electromagnetic brake 5 as it is during the stop.
Was set up.

[0005]

In order to drive this electric walking vehicle, the accelerator lever 3 is operated to drive the vehicle at a speed suitable for the walking speed, and when the battery capacity becomes low and the motor cannot drive the vehicle. The handwheel switch 6 is turned on so that the drive wheel can rotate freely and move lightly by hand. When the seat 2 is seated, the seating sensor 4 is turned on and the electromagnetic brake 5 is braked. The traveling machine body 1 is held in a stopped state.

For example, when the user sits on the seat 2 with the power switch still turned on, another person may touch the accelerator lever 3 or the hand push switch 6 to rotate the accelerator lever 3 or turn on the hand push switch 6. Even if there is, the priority determination processing means 7 gives priority to the output of the seating sensor 4, decelerates and stops during traveling, and then applies the braking force to the electromagnetic brake 5, and during stoppage, the electromagnetic brake 5 remains stopped.
Is kept in a braking state, so it does not start unexpectedly.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 3, the entire structure of the electric walking assistance vehicle is equipped with a traveling device including a driving wheel 10 provided at the front left and right center and a pair of rear left and right idler wheels 11, and a motor 12
A vehicle body cover 21 covers the vehicle body 14 on which the battery, the battery 13, the control board, and the like are mounted to form the traveling vehicle body 1.
A handle bar 15 is erected from the left and right side portions of the handlebar to the upper rear. A travel control operation box 16 is provided above the handle bar 15, and a pedestrian holds a grip 17 provided at the upper end of the handle bar 15 to rotate the accelerator lever 3 protruding from the travel control box 16 to travel. .

The traveling control box 16 has a display unit 19 for displaying a key switch 18 and a charging state of the battery 13.
Etc. When the key switch 18 is turned by one increment, the power switch 20 is turned on to enable traveling, and when further turned by one increment, the hand push switch 6 is turned on and the braking of the electromagnetic brake 5 is released to allow the hand push traveling. A recess 22 is formed in the upper part of the machine cover 21 to form a small container, and a lid for opening and closing the recess 22 also serves as a sheet and is attached to the machine cover 21 by a hinge 23. The inside of the lid 2 is hollow, the seating sensor 4 is attached to the center thereof, and when a person sits on the lid 2, the seating sensor 4 is pressed and O
The N state is set.

Next, the flow of control signals and the control state will be described with reference to the block diagram of FIG. 1 and the flow chart of FIG. The arithmetic and control unit (CPU) 24 includes a priority determination processing circuit 7. A signal input to the priority determination processing circuit 7 is an ON signal from the traveling switch 20 which is turned on by the rotation of the key switch 18. ON of the hand push switch 6 which is turned on by further rotating the key switch 18 and
The signal is input individually, and the ON signal of the accelerator lever 3 and the ON signal from the seating sensor 4 are input to the priority determination processing circuit 7.

In the priority determination processing circuit 7, the ON signal of the seating sensor 4 is given priority processing as shown in FIG. First, when the traveling switch 20 is turned on and the accelerator lever 3 is not rotated, the traveling machine body 1 is in a stopped state. First, the presence or absence of the ON signal of the seating sensor 4 is determined, and if it is ON, the electromagnetic brake 5 is turned on. The braking state will be maintained. If the seating sensor 4 is OFF, the presence or absence of the ON signal of the hand push switch 6 is next determined. If it is OFF, the electromagnetic brake 5 is held in the braking state to continue the stop, and if it is ON, the electromagnetic brake 5 is released. It can be pushed by hand.

Next, while the traveling switch 20 is turned on and the accelerator lever 3 is being rotated, the vehicle is traveling. First, the presence or absence of an ON signal from the seating sensor 4 is judged to be ON.
If so, the electromagnetic brake 5 is decelerated and brought into a braking state after stopping. If the seating sensor 4 is OFF, the presence or absence of an ON signal from the hand push switch 6 is next determined. If the hand push switch 6 is OFF, the traveling is continued as it is.

In addition to the above, a high / medium / low speed traveling speed selection signal is input to the arithmetic and control unit 24, and a rotation sensor 26 for detecting the rotation speed of the motor 12 rotates it through a rotation speed detection circuit 27. Enter the number and direction of rotation. Further, from the battery 13, the CPU power supply circuit 28
Power to the arithmetic and control unit 24 through the battery 1
The voltage of 3 is input through the battery voltage detection circuit 29. Electric power is supplied from the battery 13 to the motor 12 by the main relay 30, the forward / reverse switching circuit 31, the motor drive circuit 32, and the motor power generation braking circuit 33.

From the arithmetic and control unit 24, the main relay 3
A drive command is output to 0, a braking pulse is output to the motor power generation braking circuit 33, and a drive pulse is output to the motor driving circuit 32. Further, a forward / reverse switching command is output to the forward / reverse switching circuit 31 depending on the rotating direction of the accelerator lever 3. The electromagnetic brake 5 is in a braking state when not energized and is released when energized, and a control signal is output from the arithmetic and control unit 24 through the electromagnetic brake drive circuit 34.

The indicator 19 is composed of two LEDs for displaying the charge state of the battery 13, and the seating sensor 4 is turned on.
In case of, it blinks to inform the cause of the stop. Therefore, except when a person sits down on the seat 2, for example, when a heavy luggage is placed on the seat 2, the accelerator lever 3 does not travel even if the accelerator lever 3 is rotated. It will be clear.

When the accelerator lever 3 is rotated after the traveling switch 20 is turned on, the arithmetic unit 24 causes the main relay 3 to travel at the speed set by the speed change switch 25.
After the ON signal is output to 0, the drive pulse is output to the motor drive circuit 32 and the braking pulse is output to the motor power generation braking circuit 3
3 is output.

[Brief description of drawings]

FIG. 1 is a control block diagram.

FIG. 2 is a flowchart of control.

FIG. 3 is an overall side view.

FIG. 4 is a partial cross-sectional view.

[Explanation of symbols]

 1 traveling machine body 2 seat 3 accelerator lever 4 seating sensor 5 electromagnetic brake 6 hand push switch 7 priority determination processing means

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hideki Kumamoto 1-2-5 Kinzan, Matsuyama City, Ehime Prefecture Shikoku Manufacturing Co., Ltd.

Claims (1)

[Claims] 1. In an electric walking assist vehicle having a seat (2) on which a pedestrian can sit and rest on a traveling body (1), an operation signal of an accelerator lever (3) for controlling traveling and a person on the seat (2). The seating sensor (4) that detects that the person is sitting and the ON signal of the hand-switch (6) that releases the braking action of the electromagnetic brake (5) to enable hand-traveling are compared and determined, and the seating sensor ( When the ON signal output of 4) is present, other signal outputs are ignored, and the electromagnetic brake (5) is braked after traveling is stopped during traveling and the braking action of the electromagnetic brake (5) is continued during stoppage. An electric walking assist vehicle, characterized in that a priority determination processing means (7) for maintaining the above is provided.